问题 解答题
用简便方法计算.
7100-137-263+300
438+126+162+746×(8×7)×12525×18×4×2.
答案

(1)7100-137-263+300

=7100-(137+263)+300

=7100-400+300

=7000;

(2)438+126+162+74

=(438+162)+(126+74)

=600+200

=800;

(3)6×(8×7)×125

=6×7×(8×125)

=42×1000

=42000;

(4)25×18×4×2

=(25×4)×(18×2)

=100×36

=3600.

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