Question

456减56乘7可以简便计算吗？

Answer 1

456-56x7
=456-(50+6)x7
=456-50x7-6x7
=456-350-42
=106-42
=64

Answer 2

456—56×7
=8×57—56×7
=8×（56+1）—56×7
=8×56—7×56+8
=56×（8—7）+8
=56×1+8
=56+8
=64

Answer 3

==456－56×7=456－（50+6）×7=456-350－42=421－42=379

Answer 4

456-（56×7）
=400+56-56×7
=400-56×6
=400-（50+6）×6
=400-300-36
=100-36=64

Answer 5

456－56ⅹ7
=456－(50+6)x7
=456－(50x7)+(6ⅹ7)
=456－350+42
=64