比比谁先到对岸.
7.5﹣4.3= 2.18+6.72= 7﹣0.99=
0.47+6= 4.4+0.39= 6.3+3.6=
0.95﹣0.32= 2.4+7.3= 10.7﹣5.7=
5.4+5.04= 3.74﹣1.44= 4﹣0.01=
解方程或比例
(1)94.6﹣15X=91.6
(2)4.8:3=X:18.
直接写出得数.
3﹣2= 1÷
= 321﹣178+257=
0.875÷= 409×10﹣409= 2.25+7
=
(+
)×18= 3
+2.7+2
+1.3=
计算下面各题(能简算的要简算).
807×99+807;
[1﹣(﹣
)]×
;
20.01×83+1.7×200.1;
(1.5+2)÷3.75﹣
;
×
+
÷
.
直接写出得数.
14÷35=+
= 0.77+0.33=
×4+4×
= 0.9+99×
= 4
﹣(
+
)=
5﹣1.4﹣1.6= 2﹣﹣
=
×2÷
×2=
(+
)×12=
×
= 6.3×10%=
用递等式计算下面各题.
315+600+15×25
11.6﹣(3.6+0.8+80%)÷
+
×2
2÷[15×(﹣
)].