五年级下数学递等式①5.1÷5+4.9×20%②（8/9+1/6）×72%③3/4÷（75%+5/8）④125%×7.6-1.25×3.1+10/8×5.5
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五年级下数学递等式①5.1÷5+4.9×20%②（8/9+1/6）×72%③3/4÷（75%+5/8）④125%×7.6-1.25×3.1+10/8×5.5
五年级下数学递等式
①5.1÷5+4.9×20%②（8/9+1/6）×72%③3/4÷（75%+5/8）④125%×7.6-1.25×3.1+10/8×5.5
五年级下数学递等式①5.1÷5+4.9×20%②（8/9+1/6）×72%③3/4÷（75%+5/8）④125%×7.6-1.25×3.1+10/8×5.5
①5.1÷5+4.9×20%
=5.1×0.2+4.9×0.2
=0.2×(5.1+4.9)
=0.2×10
=2
②（8/9+1/6）×72%
=8/9×0.72+1/6×0.72
=0.64+0.12
=0.76
③3/4÷（75%+5/8）
=3/4÷（3/4+5/8）
=3/4÷11/8
=3/4×8/11
=6/11
④125%×7.6-1.25×3.1+10/8×5.5
=1.25×(7.6-3.1+5.5)
=1.25×10
=12.5
①5.1÷5+4.9×20%
=5.1×1/5+4.9×1/5
=1/5×(5.1+4.9)
=1/5×10
=2
②（8/9+1/6）×72%
=8/9×0.72+1/6×0.72
=0.64+0.12
=0.76
③3/4÷（75%+5/8）
=3/4÷（3/4+5/8）
=3/4÷11/8
=3/...
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①5.1÷5+4.9×20%
=5.1×1/5+4.9×1/5
=1/5×(5.1+4.9)
=1/5×10
=2
②（8/9+1/6）×72%
=8/9×0.72+1/6×0.72
=0.64+0.12
=0.76
③3/4÷（75%+5/8）
=3/4÷（3/4+5/8）
=3/4÷11/8
=3/4×8/11
=6/11
④125%×7.6-1.25×3.1+10/8×5.5
=1.25×7.6-1.25×3.1+1.25×5.5
=1.25×(7.6-3.1+5.5)
=1.25×10
=12.5
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①5.1÷5+4.9×20%
=5.1×0.2+4.9×0.2
=0.2×(5.1+4.9)
=0.2×10
=2
②（8/9+1/6）×72%
=8/9×0.72+1/6×0.72
=0.64+0.12
=0.76
③3/4÷（75%+5/8）
=3/4÷（3/4+5/8）
=3/4÷11/8
=3/...
全部展开
①5.1÷5+4.9×20%
=5.1×0.2+4.9×0.2
=0.2×(5.1+4.9)
=0.2×10
=2
②（8/9+1/6）×72%
=8/9×0.72+1/6×0.72
=0.64+0.12
=0.76
③3/4÷（75%+5/8）
=3/4÷（3/4+5/8）
=3/4÷11/8
=3/4×8/11
=6/11
④125%×7.6-1.25×3.1+10/8×5.5
=1.25×(7.6-3.1+5.5)
=1.25×10
=12.5
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