5.2÷0.04= 1.32+0.8= 8 ÷8= 25+7.5=
51.51÷51= + ÷ = 1.5×2÷1.5×2= 149÷30≈
0.2× = ×4÷ ×4= ÷ =
16÷20%= 3.2+ - +3.2= × ×0=
⑴1号球在白球西偏北50°方向20cm处;⑵5号球在白球南偏西40°方向15cm处;⑶8号球在白球东偏南50°方向20cm处。
0.57+4.3=
×=
73×101=
-=
2.4÷0.1=
2.6×-×0.6=
= 2.4×5= = 0.32=
= = =
0.125×8= 4.5÷5= 3.55+2.45= 6297÷9≈
299×7≈