一、看清题目,细心计算。(共24分)
1.【答案】 1 ÷0.15=10;4.6+4=8.6;3- =2 ;
2013+67=2080;63=216;10.1-1=9.1;
= ; ×2÷ ×2=4.
2.【答案】 解:①18.1-5.7-4.3+1.9
=(18.1+1.9)-(5.7+4.3)
=20-10
=10
②3.6×[2÷( -0.6)]
=3.6×(2÷0.2)
=3.6×10
=36
③32×125%×0.25
=(8×1.25)×(4×0.25)
=10×1
=10
④
=14+9-23
=23-23
=0
⑤
⑥6 ×31-64×2.7+6.4×6
=6.4×31-6.4×27+6.4×6
=6.4×(31-27+6)
=6.4×10
=64
3.【答案】 (1) x-32%=1.7
解:0.68x=1.7
x=2.5
(2)
解:
二、认真思考,仔细填空。(共20分)
4.【答案】 28;40;14;87.5;0.875