18×36 98×65-98简便运算
3个回答
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98×36+98×65-98
=98x(36+65-1)
=98x(36+64+1-1)
=98x100
=9800
谢谢,请采纳
=98x(36+65-1)
=98x(36+64+1-1)
=98x100
=9800
谢谢,请采纳
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展开全部
18×36
=(20-2)×36
=720-72
=648
98×65-98
=98×(65-1)
=98×64
=(100-2)×64
=6400-128
=6400-130+2
=6270+2
=6272
=(20-2)×36
=720-72
=648
98×65-98
=98×(65-1)
=98×64
=(100-2)×64
=6400-128
=6400-130+2
=6270+2
=6272
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展开全部
18×36
=(20-2)*36
=20*36-36*2
=720-72
=620+100-72
=620+24
=648
98×65-98
=98X(65-1)
=98X64
=(100-2)X64
=100X64-2X64
=6400-128
=6200+200-128
=6200+(200-100-28)
=6200+(100-28)
=6200+72
=6272
=(20-2)*36
=20*36-36*2
=720-72
=620+100-72
=620+24
=648
98×65-98
=98X(65-1)
=98X64
=(100-2)X64
=100X64-2X64
=6400-128
=6200+200-128
=6200+(200-100-28)
=6200+(100-28)
=6200+72
=6272
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