脱式计算.①2700×(506-499)÷900;②33.02-(148.4-90.85)÷2.5;③(1÷ 2 7 + 2
脱式计算.①2700×(506-499)÷900;②33.02-(148.4-90.85)÷2.5;③(1÷27+27÷1)÷5.1;④(1.6×58+3.6÷34)×4...
脱式计算.①2700×(506-499)÷900;②33.02-(148.4-90.85)÷2.5;③(1÷ 2 7 + 2 7 ÷1)÷5.1;④(1.6× 5 8 +3.6÷ 3 4 )× 4 29 .
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①2700×(506-499)÷900 =2700÷900×7, =3×7, =21; ②33.02-(148.4-90.85)÷2.5 =33.02-57.55÷2.5, =33.02-23.02, =10; ③(1÷
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