Multiply by 25
Multiply by 11
Multiply by 50
Multiply by 99
Multiply by 12
100

What are the steps to multiply by 25 in your head?

Possible answer Multiply by 100 and divide by 4 (or cut in 1/2 twice).

100

What are the steps to multiply by 11 in your head?

Possible answers (there could be others) Multiply by 10 and add the number.

100

What are the steps to multiply by 50 in your head?

Possible answer Multiply by 100 and cut in 1/2 (divide by 2)

100

What are the steps to multiply by 99 in your head?

Possible answer Multiply by 100 and subtract the number.

100

What are the steps to multiply by 12 in your head?

Possible answer Multiply by 10 and add twice the number.

200

5 x 25 = ?

125

200

Multiply carefully! 11 x 18 = ?

198

200

Multiply carefully! 50 x 25 = ?

1250

200

Multiply carefully! 99 x 11 = ?

1089

200

Multiply carefully! 12 x 45 = ?

540

300

Multiply carefully! 27 x 25 = ?

675

300

Multiply carefully! 11 x 23 = ?

253

300

Multiply carefully! 50 x 52 = ?

2600

300

Multiply carefully! 99 x 23 = ?

2277

300

Multiply carefully! 12 x 23 = ?

276

400

Multiply carefully! 9 x 25 = ?

225

400

Multiply carefully! 11 x 99 = ?

1089

400

Multiply carefully! 50 x 72 = ?

3600
400

Multiply carefully! 99 x 41 = ?

4059

400

Multiply carefully! 12 x 80 = ?

960

500

25= ?

14

500

112  = ?

121

500

50= ?

2500

500

Multiply carefully! 99 x 63 = ?

6237

500

12= ?

144