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=