题目内容
①100+(10+20+30)
②100-(10+20+3O)
③100-(30-10)
②100-(10+20+3O)
③100-(30-10)
①100+(10+20+30)
=100+60,
=160;
②100-(10+20+3O)
=100-60,
=40;
③100-(30-10)
=100-20,
=80.
=100+60,
=160;
②100-(10+20+3O)
=100-60,
=40;
③100-(30-10)
=100-20,
=80.
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直接写出得数
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(1)2.1 +3.4= |
(2)8.3 +1.7= |
|
(3)1 -0.01= |
(4)0.6 ×0.6= |
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(5)3.2 ×3= |
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(9)8 ×0.4= |
(10)1.9 ×4×0.5= |
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(11)0.9 +99×0.9 |
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