直接写出得数 0.3+0.47= 10﹣4.7= 0.33+0.3= 20.2﹣10.2= 7.6+0.4=3.9﹣0.6= 50.23+0.77= 48.51﹣4.09= 2.02+3.8= 8.4﹣4.8=
口算下面各题. 0.7×0.9= 0.14×0.3= 3.2×0.3= 0.16×0.5= 7×0.08= 1.8×0.04= 60×0.5= 0.24×3= 7.7×0.03= 0.12×6= 2.1×4= 0.15×0.4=
小云每秒跑6.2米. (1)小红每秒跑多少米? (2)小强每秒跑多少米?
口算. 3.14×2= 3.14×3= 3.14×4= 3.14×5= 3.14×6= 3.14×7= 3.14×8= 3.14×9= 3.14×2.7= 3.14×2+3.14×0.7=
9.2×1.01=
直接写出得数. 0.8×25= 0×4.23= 0.57+0.43= 2.4×0.2= 0.02×500= 2.8×10= 8.29×100= 2.5×0.4= 4.87﹣1.7= 8.07×1000=