5 分数的加法和减法
直接写出得数
0.75﹣
=
+
= 6
÷3= 0.125×
=
9.5×99+9.5= 0.125×32= 1.65﹣1
+8
= (
﹣0.25)×12= .
口算.
396﹣200= ; 7.8﹣7= ;
+
= ; 0.5﹣
= ;
4.5÷0.1= ; 82= ; 0÷
= ; 8×1.25%= ;
10﹣
= ; 0.5×0.3= .
(1)3318+312÷24×205
(2)47.1×9.4﹣47.1÷2﹣+47.1
(3)[(1﹣0.5)×20]÷[(1+0.25)÷4]
(4)
(5)100﹣99+98﹣97+96﹣…+4﹣3+2﹣1
(6)
.
直接写出得数.
2.35+1.5=
+2.5=
+
= 0.32= 12÷
=
×8=
÷
= 2.8﹣2
= 8.2﹣(5.3﹣1.8)= 0.1+99×0.1=
直接写得数.
1﹣0.92= 12.12﹣12=
=
=
=
= 2.7+1.63+7.3= 0.83×9+0.83=
1.25×
= 78÷2.5÷4=
直接写得数
0.125×8= 0.056×
= 7÷1.4= 1.75+25%=
1.8×(1﹣
)=
×0.3=
×9+
×9=
=
1÷0.1﹣1×0.1=
=
直接写得数.
1.2÷
= 1÷0.01﹣1=
﹣
= 5÷
×5=
2÷2%= 0.5﹣20= 5.7+11.8+4.3= 2
﹣
+
=
(
+
)×24= 4.9×81=
脱式计算(能简算的用简便方法计算,写出计算过程.)
(1)7.5×2.3﹣1.9×2.5
(2)(78.6﹣0.786×25+75%×21.4)×2011÷75
(3)1
+2
+3
+4
+5
(4)9.1+9.2+9.3+…10.7+10.8+10.9.
脱式计算.
15
﹣(5
+3
)﹣4
1
×43×70%﹣2÷
[2.1+7÷(3
﹣1
)]×1
(
×5÷
×5)×(1.685÷1
﹣0.235×
)
1﹣[4
﹣(31%﹣
)×16
]÷1
15
÷63%﹣[24
﹣8
×(3
﹣287.5%)]





×1.5=
=
÷5×
×5+
﹣
=
=
=
=
= 4×(0.6+1.9)= 7×0.25×0.4=
= 3×456÷123= 1×99﹣9.9=
= 16.16÷16=
=
=
+
)×15×17
﹣(
﹣
)
﹣(2
﹣1
)
=
= 0.25×99+0.25=
=
=
=
=
=
= 8×3.2+8×6.8=
=
﹣
×
÷
=
=
﹣
= 0.125×1.6×0.8=
+
+
1﹣
﹣
+
+
﹣(
﹣
)
+
+
﹣
﹣
.
=
=
=
=
.
.
﹣4
=
=
=
= 0.1+0.2×0.3=
=
=
=
.
= 3.17+37.1﹣2.17=
=
=
=
=
÷60%= 7﹣3.2﹣2.8= (0.75﹣
)×16=
﹣
=
×
÷
+
=
+
×
=
+
= 3.7+1.9=
= 0.27÷0.3= 1÷100%=
×
)=
= (2)0.75÷15= (3)
﹣
=
+
﹣
)= (5)11
﹣2
+3
﹣0.2= (6)80%×
+
÷
= .
﹣
= 1÷(
﹣0.2)=
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