5 分数的加法和减法
口算
65+37×0= 28×0÷54= 4×28×25= 100×3÷100×3=
25×28= 50﹣25÷5= 2.7×0.03= 2.4÷0.06=
4.2÷3= 1×0.94= 1.2×0.8= 0.39÷1.3=
1﹣
=
+
=
﹣
=
+
=
计算:
128+35×3 700﹣125×3 330÷5+46×7 (210+630)÷7
145﹣150÷2+23 560÷4﹣630÷7 12×(280﹣80÷4) 38.7÷9﹣66.8÷40
(135+55)÷(15﹣7) 4.5+5.5÷5﹣3.42 26×4﹣425÷5 (100﹣51)÷0.07
(37×15﹣55)×8 (445÷5+172)×18 300﹣(76+40×3) 8.9×200﹣1.2÷0.06
522÷(328﹣319)+42
+
+
1﹣
+
.
简算.
76×101﹣76 58+39+42+61 4×39×2.5 (25×15)×4 25×42×4
125×32 3.6×97+3.6×3 4×25+16×25 36×45+36×56﹣36 68×102
64×15﹣14×15 167+289+33 25×64×125 378+525+75 0.4×25×1.6×25
5×289×2 79×2.5+2.5 4.08÷1.25÷0.8 125×88 87×9.9
101×0.82﹣0.82 25×97+25×3 (125+17)×8 66×93+93×33+93
+
+
=
1﹣
﹣
=
+
+
=
+
﹣
= 1﹣
﹣
=
直接写出得数
777×9+111×37= 0.3÷5=
﹣
= 42×(
+
)=
×
÷
×
=
×
×7×4= 2.5×9.9×40= 1÷
÷
=
999
+99
+9
+
= 17.9﹣(2.5+7.9)=
直接写得数:
+
= 7÷2.5÷4= 4.8÷0.12= (
﹣
)×12=
(25%﹣
)×7.5= 2.2+3.57= 2÷
= 0.25×40=
÷
﹣
÷
=
+
÷
=
直接写出得数.
12+48= 2.4×5= 78﹣0.8= 6.3÷0.1=
﹣
=
+
= 8﹣
=
÷6=
0÷
= 10.1﹣1=
×15= 2.3×4=
+
= 6÷
=
﹣
=
直接写出得数.
4×0.2= 9﹣0.9= 7.2÷0.4= 183÷7=
﹣
= 6÷(
﹣
)= 24÷
= 1﹣
+
=
5﹣(0.5+3.4)=
×(1﹣
)= 1÷
×
=
+
÷
= .





=
=
﹣
= 12×(27+33)=
+1.25= ; 1
﹣
﹣
= .
﹣(
)
﹣1.375﹣2
.
+2.6+
+0.4
+99×
×6.6+2.5×
(2)
﹣
﹣
.
=
=
=
=
=
=
=
=
=
=
= 50÷50%=
=
=
= 9.7﹣6.8=
=
=
=
﹣3
=
﹣
﹣
=
+
)×16=
﹣
= 1÷1.25= 2.62×3.8≈(按四舍五入法,把得数凑整到百分位)
+
= (12.5+
)×8= 19﹣3
﹣4
= 8+0.1÷0.1﹣8=
=
+
= 0.12+0.98= 12.5%×80= (
﹣
)×12=
﹣
+
﹣
= ;
= ; 1÷0.05= ;
= ; 4÷9×
= ;
= .
.
=
=
=
=
+
=
×2÷
= 15.2﹣0.9=
= 12÷35=
=
=
=
=
﹣
﹣
+2.875÷4.
+
=
+
﹣
+
+
)×24= 0.32﹣0.22=

.
+
= 1﹣
+
=
÷
= 7×8×(
+
)=
÷
×0= 1﹣
÷
+
= 1﹣
×4=
×4=
=
÷(
)=
÷0.4= 70﹣0.98=
a×
=
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