题目内容
(78×15+380)×5
(5008-99×36)÷19
275×15+308×13
(7020+4050÷18)÷45.

(5008-99×36)÷19
275×15+308×13
(7020+4050÷18)÷45.
(1)(78×15+380)×5
=(1170+380)×5,
=1550×5,
=7750;
(2)(5008-99×36)÷19
=(5008-3564)÷19,
=1444÷19,
=76;
(3)275×15+308×13
=4125+4004,
=8129;
(4)(7020+4050÷18)÷45.
=(7020+225)÷45,
=7245÷45,
=161.
| . |
| ① |
| . |
| ② |
| . |
| ③ |
=(1170+380)×5,
=1550×5,
=7750;
(2)(5008-99×36)÷19
| . |
| ① |
| . |
| ② |
| . |
| ③ |
=(5008-3564)÷19,
=1444÷19,
=76;
(3)275×15+308×13
| . |
| ① |
| . |
| ① |
| . |
| ② |
=4125+4004,
=8129;
(4)(7020+4050÷18)÷45.
| . |
| ① |
| . |
| ② |
| . |
| ③ |
=(7020+225)÷45,
=7245÷45,
=161.
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