问题
解答题
|
答案
①99×99+99,
=99×(99+1),
=99×100,
=9900;
②10×0.1×100,
=1×100,
=100;
③8÷8÷0.125,
=8÷(8×0.125),
=8÷1,
=8;
④37×39-29×37,
=37×(39-29),
=37×10,
=370;
⑤1.8÷2.7÷0.6×2.7,
=1.8÷0.6,
=3;
⑥47×99,
=47×(100-1),
=47×100-47,
=4700-47,
=4653;
⑦0.5+[
÷(0.15+5 6
)],9 20
=0.5+[
÷(0.15+0.45)],5 6
=0.5+(
÷5 6
),3 5
=
+9 18
,25 18
=
,34 18
=
;17 9
⑧[(
+2.1)×3 20
]÷0.9,4 7
=(
×3 20
+2.1×4 7
)÷4 7
,9 10
=(
+3 35
)×6 5
,10 9
=
×3 35
+10 9
×6 5
,10 9
=
+2 21
,4 3
=
,10 7
=1
.3 7