Step 1 of 4 · The trick
Both numbers end in 0? Strip the zero and think in
tens
.
180 =
18 tens
· 40 =
4 tens
So 180 − 40 =
18 tens − 4 tens
=
14 tens
=
140
It's the same as
18 − 4 = 14
· just remember the unit is
tens
, so the answer is in tens too.
See it animated
Step 2 of 4 · 180 − 40
180 − 40 =
140
Replay
Next
Step 3 of 4 · 120 − 50 (no borrow needed!)
120 − 50 =
70
Replay
Practice
Step 4 of 4 · Your turn
Think in tens.
Next question
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You used the tens trick.
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