Grade 1 · Math · Tens Subtraction

Tens Laser Defense

Fire minus-ten lasers and lock the shield at the right power.

DEFENSE 1 OF 5

Power starts at 40. Take away 20. Fire minus ten lasers, then lock the answer.

1 / 5

40−20=?

40POWER

10101010

REMOVED0ofTARGET200 shots

Fire one −10 laser at a time.

Subtracting a multiple of ten removes whole tens. The ones stay unchanged when only tens are removed.

For 76 − 30, remove three tens: 76, 66, 56, 46. The result still has six ones.

Count the number of ten-unit shots, not just the final digits.

A free Grade 1 math game for practicing subtract multiples of ten. No account or download is needed.

Learning area: Adding & subtracting · Subtracting Tens.

Difficulty: 2 · Practice within Grade 1. Apply a skill with more choices, larger numbers or extra steps.

Fire a minus-ten laser one shot at a time, watch the shield power and tens blocks decrease, then lock the answer after the target amount is removed.

Choose an activity that fits your learner. Grade labels are a guide; adults can help with the instructions.