1、35×35的速算方法:
=(30 + 5)x 35
=30 x 35 + 5 x 35
=1050 + 175
=1225
2、35×35的速算方法:
=3 x (3 + 1) x 100 + 5 X 5
=3 x 4 x 100 + 5 x 5
=1200 + 25
=1225
1、35×35的速算方法:
=(30 + 5)x 35
=30 x 35 + 5 x 35
=1050 + 175
=1225
2、35×35的速算方法:
=3 x (3 + 1) x 100 + 5 X 5
=3 x 4 x 100 + 5 x 5
=1200 + 25
=1225