题目内容
| 3.6+20+5.4 | 16.7-5.4-4.6 |
| (16+16+16+16)×25 | 728×79+272×79 |
| 4000÷125×8 | (214-98÷14)×12. |
(1)3.6+20+5.4
=3.6+5.4+20
=29;
(2)16.7-5.4-4.6
=16.7-(5.4+4.6)
=16.7-10
=6.7;
(3)(16+16+16+16)×25
=16×(4×25)
=16×100
=1600;
(4)728×79+272×79
=(728+272)×79
=1000×79
=79000;
(5)4000÷125×8
=32×8
=256;
(6)(214-98÷14)×12
=(214-7)×12
=207×12
=2484.
=3.6+5.4+20
=29;
(2)16.7-5.4-4.6
=16.7-(5.4+4.6)
=16.7-10
=6.7;
(3)(16+16+16+16)×25
=16×(4×25)
=16×100
=1600;
(4)728×79+272×79
=(728+272)×79
=1000×79
=79000;
(5)4000÷125×8
=32×8
=256;
(6)(214-98÷14)×12
=(214-7)×12
=207×12
=2484.
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