问题 解答题
432÷(9×8)216+
305
5
47+236+645+25×44
645-180-245.
答案

(1)432÷(9×8)

=432÷9÷8

=48÷8

=6;

(2)216+

305
5

=216+61

=277;

(3)47+236+64

=47+(236+64)

=47+300

=347;

(4)5+25×44

=5+25×(4×11)

=5+(25×4)×11

=5+100×11

=5+1100

=1105;

(5)645-180-245

=645-245-180

=400-180

=220.

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