直接写得数.
698+560= 1200﹣909= 1.3+0.41= 500÷5÷20=
2.7﹣1.58= 2.5×0.4= 1.4÷3.5= 3.65+0.36×0=
452.4÷48.9≈ 201.2×39≈ = =
1.65+0.8= 3.6﹣0.36= 1÷= 8.4+99×8.4=
= = = =
计算下题,能简便的要简便计算,并写出必要的过程.
①6.6﹣48×÷4.8 ②×0.6+÷ ③63×+36×+75%
④[3.6﹣(+1÷3)]× ⑤0.008×0.000125+0.0125÷0.04 ⑥1﹣﹣﹣﹣.
脱式计算(能简算要简算)
(1)(66﹣32×1.2)÷0.25 (2)10×+17×75%﹣7×0.75
(3)0.25×(5(3﹣2.5×)) (4)9.99×22.2+33.3×3.34.
递等式计算(能简便的要简便).
(3618÷18﹣145)×20 4.2÷×﹣0.5 8.375+﹣+
×37﹣19÷ ÷[2﹣(+)] (2﹣×)÷(+)
试题篮
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