5 分数的加法和减法
直接写得数.
①16×50= ②
﹣
= ③0.72÷0.9=
④137+26= ⑤6﹣0.05= ⑥1÷0.1%=
⑦578﹣299= ⑧
+
= ⑨3.14×302=
⑩
×
÷
×
= .
直接写出计算结果
①636﹣198= ②3.6÷0.036= ③7÷19=
④3.7×1%= ⑤6÷(
﹣
)= ⑥8.1+
=
⑦
×(15+
)= ⑧1﹣
+
=
直接写得数.
3992+2118=
= 3.6×
= 2.3÷1.6×3.2=
3.86+5.24=
= 5.75﹣(
)= 0.125÷
=
4.02﹣2.03=
=
=
直接写出得数.
+
= 2.64+3.6= 2.4×50= 2050﹣298=
0.7÷7%= 3500÷70= 1﹣1÷3= 10﹣0.57﹣0.43=
8.3×2.6+7.4×8.3=
+
=
直接写出得数.
3.64+2.56= 0.37﹣0.19= 2.7×5=
4.8÷0.6=,
﹣
= 2﹣2×
= (
+
)×20=
3÷4+0.25= 703×59≈ 2415÷81≈
小莉10岁生日这天,爸爸买来一个生日蛋糕.小莉吃了生日蛋糕的
,爸爸吃了这个蛋糕的
,其余的被妈妈吃了.
(1)爸爸比小莉多吃了蛋糕的几分之几?
(2)小莉和爸爸一共吃了蛋糕的几分之几?
(3)妈妈吃了蛋糕的几分之几?
直接写出得数.
1.36+0.24= 320﹣180= 10﹣2
= 36÷0.4=
﹣
=
+
= 1.2×50=
×5=
9×
=
×
= 0.375×4= 9÷
=
直接写出得数:
= 4+3%= 2.15﹣(1.15﹣0.15)=
=
50%×(2.9﹣2.7)=
= 1÷
﹣
÷1
=
=
×(
)=
= 2﹣150%=
直接写出得数
1546﹣998= 7﹣
= 1÷0.375=
﹣3.67﹣1.33=
1.3÷0.26= 25×32×0.125=
+4.9+
+5.1= (
﹣3.75)×
=
直接写出结果.(有近似值符号的只要求估算)
2005+980= 1﹣0.82= 0.22×11= 36÷0.9=
25π≈
+
= 0.25×8.5×4= 4.5×9+4.5=
÷
= 51×98≈
直接写得数
912﹣797=
= 4×(0.6+1.9)= 2.7×0.25×0.4=
26×5.5=
= 12.3×456÷123= 10.1×99﹣9.9=






+
= + = .
=
=
=
=
=
=
=
=

﹣(
)
﹣
﹣
.
= 9.3﹣5.8= 0.001×3060=
)÷
= 7.95﹣0.73﹣0.27= 3.67×(
﹣7.75)=
+3
=
﹣1﹣
﹣2.125=
=
= 4.2÷0.07= 7.2×
= 11×
=
吨煤,用去
,还剩下这堆煤的几分之几? .
+
= 0.77+0.33=
×4+4×
=
﹣
=
=
=
= 3.838÷38= 
= 1﹣
+
=
×4÷
×4=
÷4×
+
= (
﹣
)×12=
÷0.18= 4.8﹣1.3﹣2.7=
=
﹣
= 1÷
×
= 1﹣1%= 38﹣19=
=
﹣
=
= 14÷25=
÷7=
﹣0.4= 1÷
×3= 0.01÷0.1=
×
÷
﹣0.7+
=
=
+1
= ;
×
÷
+
=
+
=
=
×6×
=
×
÷
+
=
= 15﹣0÷
= 8﹣
﹣
= 90.5×9+90.5=
=
+
=
= 2
×2=
=
+
=
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