Controller down. Brain turbo on.
Mission:
Parcel Express!
At the island depot, parcels are stacked in long rows. Anyone who knows their times tables up to 20 can deliver the fastest.
Times table turbo on!
How to practice: one mission a day (15 to 20 minutes) and 5 minutes in the trainer. Focus: 11 to 20 times 1 to 10.
Tablet tip: In the times table trainer you practice with big buttons, a hint for every mistake and a 10-problem test.
Open the trainerTimes tables to 20 · splitting
Split Trick
A big stack of parcels is just a stack of ten plus a few more. That turns every big multiplication fact into two small ones.
17 × 6 = 10 × 6 + 7 × 6 = 60 + 42 = 102
Show your steps
Twelve boxes.
Now in your head
Eight problems.
Times tables to 20 · tricks
Double & Neighbor
Two pro tricks from the depot: doubling for 12, 14, 16, 18 and the neighbor trick for 19 and 18.
Double it
Eight boxes.
Neighbor trick
Nine boxes.
Trick mix: use your favorite trick
Eight problems.
Times 1, 2, 10 and 20: 17 × 1 = 17, 17 × 2 = 34 (double), 17 × 10 = 170 (add a zero), 20 × 7 = 140 (twice 10 × 7).
Bonus trick for 15: 15 is 10 + 5, and 5 is half of 10. 15 × 8 = 80 + 40 = 120 (40 is half of 80).
Division and missing numbers
Divide & Fill the Gaps
In the depot everything is shared fairly: the same number of parcels on every shelf. For that you need the inverse fact.
Fact families
Two families.
Division
Eight problems.
Which number is missing?
Six gaps.
Continue the times table patterns
Nine boxes.
Both numbers above 10 · word problems
Pro Warehouse
In the pro warehouse both numbers are big. No problem: just split the second number.
Show your steps
Twelve boxes.
Multiplication table: left number times top number
| × | 6 | 8 | 12 | 14 |
|---|---|---|---|---|
| 13 | ||||
| 17 | ||||
| 19 |
Twelve boxes.
Word problems with number sentence and answer
1 The delivery van carries 16 crates. Each crate holds 9 parcels. How many parcels is that in all?
2 Pro: A pallet has 12 rows of 15 parcels. 17 parcels have already been delivered. How many parcels are still on the pallet?
Compare your answer sentences with the answer key.
Everything mixed · like a test
Test Check
Now show what you can do: lightning round, error detective and a word problem. Afterwards you know exactly what you’ve got.
Lightning round: 12 problems, goal 3 minutes
Time: ______
Error detective: right or wrong?
Check each one. Mark it and write the correct answer next to it, even if it is already right.
Five facts.
Word problem
1 126 parcels are shared equally among 14 shelves. How many parcels go on each shelf?
Compare your answer sentence with the answer key.
Traffic light: how sure are you?
Extra · on a tablet or computer
Times Table Trainer
Pick a practice type and tap your answer. If you make a mistake, the trainer shows you the right trick.
Test: 10 problems
10 problems with a timer. Wrong ones go on your practice list.
Your last tests:
The check buttons count correct boxes. Compare explanations and answer sentences with the answer key yourself.
ANSWER KEY · Try first, then compare.
Answers
1 · Split Trick
16 × 7 = 70 + 42 = 112
18 × 4 = 40 + 32 = 72
13 × 9 = 90 + 27 = 117
B 15 × 6 = 90 | 12 × 8 = 96 | 17 × 3 = 51 | 11 × 9 = 99 | 19 × 5 = 95 | 14 × 4 = 56 | 16 × 6 = 96 | 13 × 7 = 91
Typical mistake: 17 × 6 = 10 × 6 + 7 = 67. The ones must be multiplied by 6 too: 7 × 6 = 42.
2 · Double & Neighbor
B 120 − 6 = 114 | 160 − 8 = 152 | 180 − 18 = 162 | 80 − 4 = 76
C 18 × 8 = 144 | 19 × 9 = 171 | 15 × 8 = 120 | 12 × 9 = 108 | 16 × 9 = 144 | 14 × 8 = 112 | 20 × 7 = 140 | 17 × 8 = 136
With 18, take away two groups: 18 × 9 = 180 − 18, not 180 − 9.
3 · Divide & Gaps
13 × 8 = 104, 8 × 13 = 104, 104 ÷ 8 = 13, 104 ÷ 13 = 8
B 84 ÷ 12 = 7 | 126 ÷ 14 = 9 | 135 ÷ 15 = 9 | 152 ÷ 19 = 8 | 96 ÷ 16 = 6 | 117 ÷ 13 = 9 | 190 ÷ 10 = 19 | 34 ÷ 2 = 17
C 13 × 6 = 78 | 17 × 9 = 153 | 20 × 8 = 160 | 18 × 8 = 144 | 19 × 7 = 133 | 16 × 2 = 32
D 17, 34, 51, 68, 85, 102
19, 38, 57, 76, 95, 114
160, 144, 128, 112, 96, 80
4 · Pro Warehouse
12 × 17 = 120 + 84 = 204
16 × 14 = 160 + 64 = 224
18 × 12 = 180 + 36 = 216
B 13: 78, 104, 156, 182
17: 102, 136, 204, 238
19: 114, 152, 228, 266
4 · Word problems
2: 12 × 15 = 180, 180 − 17 = 163. 163 parcels are still on the pallet.
5 · Lightning round
5 · Error detective
19 × 6 = 114: right
15 × 9 = 125: wrong, correct: 135
16 × 7 = 112: right
14 × 13 = 172: wrong, correct: 182
5 · Word problem
For grown-ups: what helps most
- 10 minutes every day beats one hour once. The 10-problem trainer test shows the progress.
- When there is a mistake, have the child explain the trick out loud (“10 times 6 is 60, 7 times 6 is 42 …”), not just correct the answer.
- The basis is the basic multiplication facts up to 10 × 10. If those wobble, review them first.