脱式计算.(能简算的要简算)15-3.7-4.64 45.5-(0.98+5.5)3.15+1....
脱式计算.(能简算的要简算)15-3.7-4.6445.5-(0.98+5.5)3.15+1.83+6.85+2.1732×0.25×1.250.85×101-0.855...
脱式计算.(能简算的要简算)15-3.7-4.64 45.5-(0.98+5.5)3.15+1.83+6.85+2.1732×0.25×1.25 0.85×101-0.85 5.4÷25÷4
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①15-3.7-4.64
=15-(3.7+4.64)
=15-8.34
=6.66
②45.5-(0.98+5.5)
=45.5-5.5-0.98
=40-0.98
=39.02
③3.15+1.83+6.85+2.17
=(3.15+6.85)+(1.83+2.17)
=10+4
=14
④32×0.25×1.25
=(8×4)×0.25×1.25
=(4×0.25)×(1.25×8)
=1×10
=10
⑤0.85×101-0.85
=0.85×(101-1)
=0.85×100
=85
⑥5.4÷25÷4
=5.4÷(25×4)
=5.4÷100
=0.054
=15-(3.7+4.64)
=15-8.34
=6.66
②45.5-(0.98+5.5)
=45.5-5.5-0.98
=40-0.98
=39.02
③3.15+1.83+6.85+2.17
=(3.15+6.85)+(1.83+2.17)
=10+4
=14
④32×0.25×1.25
=(8×4)×0.25×1.25
=(4×0.25)×(1.25×8)
=1×10
=10
⑤0.85×101-0.85
=0.85×(101-1)
=0.85×100
=85
⑥5.4÷25÷4
=5.4÷(25×4)
=5.4÷100
=0.054
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