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472+503 =472+500+3 =972+3 =975 143+(57+26) =143+57+26 =200+26 =226 78-46-14 =78-(46+14) =78-60 =18 32×125 =4×8×125 =4×(8×125) =4×1000 =4000 38×29+38 =38×(29+1) =38×30 =1140.
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展开全部
472+503
=472+500+3
=972+3
=975
143+(57+26)
=143+57+26
=200+26
=226
78-46-14
=78-(46+14)
=78-60
=18
32×125
=4×8×125
=4×(8×125)
=4×1000
=4000
38×29+38
=38×(29+1)
=38×30
=1140
=472+500+3
=972+3
=975
143+(57+26)
=143+57+26
=200+26
=226
78-46-14
=78-(46+14)
=78-60
=18
32×125
=4×8×125
=4×(8×125)
=4×1000
=4000
38×29+38
=38×(29+1)
=38×30
=1140
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