列综合算式或方程,并计算.
(1)15的比它的
少多少?
(2)一个数的是18,这个数的25%是多少?
直接写出得数.
2005+620= 1﹣0.09= 0.45×101= 2÷0.02=÷5.25=
+6.25=
×
=
÷
= 5﹣
= 1﹣
+
=
直接写出得数
4.35+19.9= 18×0.5= 12÷=
8×25%= 3﹣3÷4= 6÷0.1=
4210÷703≈ 99÷81=(﹣0.625)×0.84=
3.8×5.5+4.5×3.8=
口算.=
=
= 2.25+
=
= 2.5×0.1= 7.5÷0.5=
=
20.1+9.09=×
=
﹣
= 1÷0.1﹣1×0.1=
(+
)×63=0.5÷
= 0.4÷40%= 0.42﹣0.32=
+62.5%= 78×9.9+7.8= 7×
÷7×
=
+
=
3.2万+1.8万= 4×2.7×0.25= 5﹣0.25+0.75= 0.42﹣0.32=