Question

32*66+37*33-33的简便方法

Answer 1

先观察66能拆成33ⅹ2，即32x66=32Ⅹ33x2=64X33，再想办法想个数与37凑整，发现64ⅹ33-33=33x(64-1)=33x63，63与37恰好凑整，于是
32x66十37x33-33
=32X2X33一33十37ⅹ33
=33X(64一1)十37x33
=33X63十37x33
=33X(63十37)
=33x100
=3300

Answer 2

32×66+37×33-33
=32×2×33-33+37×33
=64×33-33+37×33
=63×33+37×33
=(63+37)×33
=3300