简便方法计算,写出主要计算过程.
(1)6.12++2.88+
(2)
﹣(
﹣
) (3)
﹣(
+
)
(4)+
﹣
+
(5)
+
+
﹣
(6)
﹣
﹣
.
直接写出得数
73+827= 30﹣6.3= 0.4×0.25= 0.06÷0.6=÷12=
=
×
= 18×(
+
)=
直接写出得数
651﹣105= 0.65+2.35= 0.1×0.03=(0.27+0.9)÷0.9=
2﹣=
= 64÷0.08=
=
=
= 10﹣
﹣0.875
=
直接写出下面算式的结果
830﹣250= 0.34+0.66= 30﹣19.7= 6×1=
0.4×0.6= 1+
= 8.7÷100= 1÷
=
7﹣3=(
﹣
)÷21= 4×(
+
)=
+2×
﹣
=
直接写得数.
345+233= 45×11= 527﹣398= 235﹣47﹣53=
0.78+1.32== 2.56+1.4= 1.9×4×0.5=
3.67÷100= 3.25×1000= 0.125×0.8= 3.6+2.8+6.4=
6.08×304≈ 4838÷61≈ 15﹣2.55==
=
=
=
=
直接写出得数:
578+216= 18.25﹣3.3= 0.99×9+0.99= 3.2﹣= 2
÷3=
2×
=
×8.1= 1
×8+1
×2=
+
= 21
÷7=