用递等式计算(能简算的要用简便方法计算). 4.32+3.2+5.68 &...
用递等式计算(能简算的要用简便方法计算).4.32+3.2+5.6879×101-79132+25×820-325×5(0.125×8-0.5)×4(0.25+58)÷(...
用递等式计算(能简算的要用简便方法计算). 4.32+3.2+5.68 79×101-79 132+25×820-325×5 (0.125×8-0.5)×4 (0.25+58)÷(74-78)
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(1)4.32+3.2+5.68
=4.32+5.68+3.2,
=10+3.2,
=13.2;
(2)79×101-79
=(101-1)×79,
=100×79,
=7900;
(3)132+25×8
=132+200,
=332;
(4)20-
×5
=20-
,
=19
;
(5)(0.125×8-0.5)×4
=(1-0.5)×4,
=0.5×4,
=2;
(6)(0.25+
)÷(
-
)
=(
+
)÷(
?
),
=
÷
,
=1.
=4.32+5.68+3.2,
=10+3.2,
=13.2;
(2)79×101-79
=(101-1)×79,
=100×79,
=7900;
(3)132+25×8
=132+200,
=332;
(4)20-
3 |
25 |
=20-
3 |
5 |
=19
2 |
5 |
(5)(0.125×8-0.5)×4
=(1-0.5)×4,
=0.5×4,
=2;
(6)(0.25+
5 |
8 |
7 |
4 |
7 |
8 |
=(
2 |
8 |
5 |
8 |
14 |
8 |
7 |
8 |
=
7 |
8 |
7 |
8 |
=1.
展开全部
(1)4.32+3.2+5.68
=4.32+5.68+3.2,
=10+3.2,
=13.2;
(2)79×101-79
=(101-1)×79,
=100×79,
=7900;
(3)132+25×8
=132+200,
=332;
(4)20-
×5
=20-
,
=19
;
(5)(0.125×8-0.5)×4
=(1-0.5)×4,
=0.5×4,
=2;
(6)(0.25+
)÷(
-
)
=(
+
)÷(
?
),
=
÷
,
=1.
=4.32+5.68+3.2,
=10+3.2,
=13.2;
(2)79×101-79
=(101-1)×79,
=100×79,
=7900;
(3)132+25×8
=132+200,
=332;
(4)20-
3 |
25 |
=20-
3 |
5 |
=19
2 |
5 |
(5)(0.125×8-0.5)×4
=(1-0.5)×4,
=0.5×4,
=2;
(6)(0.25+
5 |
8 |
7 |
4 |
7 |
8 |
=(
2 |
8 |
5 |
8 |
14 |
8 |
7 |
8 |
=
7 |
8 |
7 |
8 |
=1.
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