12x35 85x5x4 15x24 4x8x25 25x(24+56) 84x125x8 5x(28x4)简便计算
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发布时间:2022-11-29 07:32
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热心网友
时间:2023-10-26 22:45
12x35
=6×(2×35)
=6×70
=420
85x5x4
15x24
=15×4×6
=60×60
=360
4x8x25
=4×25×8
=100×8
=800
25x(24+56)
=25×80
=25×4×20
=100×20
=2000
84x125x8
=84x(125x8 )
=84x1000
=84000
5x(28x4)
=5×4×28
=20×28
=560
热心网友
时间:2023-10-26 22:45
12x35=6x2x5x7=6x(2x5)x7=6x7x(2x5)=42x10=420
85x5x4=17x5x5x4=17x(5x5x4)=17x100=1700
15x24=5x3x2x12=(5x2)x(3x12)=10x36=360
4x8x25=8x4x25=8x(4x25)=8x100=800
25x(24+56)=25x80=25x4x20=100x20=2000
84x125x8=84x(125x8)=84x1000=84000
5x(28x4)= 5x(28x4)=5x4x28=20x28=560