小学四年级数学用简便方法计算:
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216+64*42/28
=216+16×4×6×7÷(4×7)
=216+16×6
=216+96
=312
15*27-3000/25
=15×27-15×2×100÷25
=15×(27-8)
=15×(20-1)
=15×20-15
=300-15
=285
402-357+98
=402+98-357
=143
576-287+124
=576+124-287
=413
=216+16×4×6×7÷(4×7)
=216+16×6
=216+96
=312
15*27-3000/25
=15×27-15×2×100÷25
=15×(27-8)
=15×(20-1)
=15×20-15
=300-15
=285
402-357+98
=402+98-357
=143
576-287+124
=576+124-287
=413
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展开全部
216+64×42÷28
=216+16×4×6×7÷28
=216+16×6
=312
15×27-3000÷25
=15×27-(3000×4)÷(25×4)
=15×27-120
=15×(27-8)
=15×19
=15×(20-1)
=285
402-357+98
=402+98-357
=143
576-287+124
=576+124-287
=413
=216+16×4×6×7÷28
=216+16×6
=312
15×27-3000÷25
=15×27-(3000×4)÷(25×4)
=15×27-120
=15×(27-8)
=15×19
=15×(20-1)
=285
402-357+98
=402+98-357
=143
576-287+124
=576+124-287
=413
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前两人题看不出
402-357+98
=402+98-357
=500-357
=143
576-287+124
=576+124-287
=700-287
=413
402-357+98
=402+98-357
=500-357
=143
576-287+124
=576+124-287
=700-287
=413
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已踩过<
评论
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你对这个回答的评价是?
展开全部
216+64×42÷28
=216+16×4×7×6÷28
=216+16×6
=216+96
=312
15×27-3000÷25
=15×27-30×100÷25
=15×27-30×4
=15×(27-8)
=15×15
=225
402-357+98
=400+2+98-357
=500-357
=143
576-287+124
=576+124-287
=700-300+13
=413
=216+16×4×7×6÷28
=216+16×6
=216+96
=312
15×27-3000÷25
=15×27-30×100÷25
=15×27-30×4
=15×(27-8)
=15×15
=225
402-357+98
=400+2+98-357
=500-357
=143
576-287+124
=576+124-287
=700-300+13
=413
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已踩过<
评论
收起
你对这个回答的评价是?
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