425-83-17 74×38+74×62 32×125 99×35 526-(134+226) 7.25+49.6+5
1个回答

(1)425-83-17,

=425-(83+17),

=425-100,

=325;

(2)74×38+74×62,

=74×(38+62),

=74×100,

=7400;

(3)32×125,

=4×8×125,

=4×(8×125),

=4×1000,

=4000;

(4)99×35,

=(100-1)×35,

=100×35-35×1,

=3500-35,

=3465;

(5)526-(134+226),

=526-226-134,

=300-134,

=166;

(6)7.25+49.6+52.75,

=7.25+52.75+49.6,

=60+49.6,

=109.6.