奥数计算题66*68+33*64543*36+117*36+660*64

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奥数计算题66*68+33*64543*36+117*36+660*64
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奥数计算题66*68+33*64543*36+117*36+660*64
奥数计算题66*68+33*64
543*36+117*36+660*64

奥数计算题66*68+33*64543*36+117*36+660*64
66*68+33*64
=66*68+33*2*32
=66*68+66*32
=66*(68+32)
=66*100
=6600
543*36+117*36+660*64
=36*(543+117)+660*64
=36*660+660*64
=660*(36+64)
=660*100=6600

66*68+33*64
=66*68+33*2*32
=66*68+66*32
=66*(68+32)
=66*100
=6800

66*68+33*64
=66*68+33*2*32
=66*68+66*32
=66*(68+32)
=66*100
=6600