| (78×15+380)×5 (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. |
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