计算下面各题,能简算的要简算.(1)(78+1316)÷1316(2)50×15÷1500×15000(3)4445×99+4445(4)58-[(12+35)×511](5)98×297(6)21-

题目简介

计算下面各题,能简算的要简算.(1)(78+1316)÷1316(2)50×15÷1500×15000(3)4445×99+4445(4)58-[(12+35)×511](5)98×297(6)21-

题目详情

计算下面各题,能简算的要简算.
(1)(
7
8
+
13
16
)÷
13
16

(2)50×
1
5
÷
1
500
×
1
5000

(3)
44
45
×99+
44
45

(4)
5
8
-[(
1
2
+
3
5
)×
5
11
]
(5)98×
2
97

(6)21-
19
20
×21.
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"7
8
+class="stub"13
16
)÷class="stub"13
16

=class="stub"27
16
×class="stub"16
13

=class="stub"27
13


(2)50×class="stub"1
5
÷class="stub"1
500
×class="stub"1
5000

=50×class="stub"1
5
×500×class="stub"1
5000

=1;

(3)class="stub"44
45
×99+class="stub"44
45

=class="stub"44
45
×(99+1),
=class="stub"44
45
×100,
=97class="stub"7
9


(4)class="stub"5
8
-[(class="stub"1
2
+class="stub"3
5
)×class="stub"5
11
],
=class="stub"5
8
-[class="stub"11
10
×class="stub"5
11
],
=class="stub"5
8
-class="stub"1
2

=class="stub"1
8


(5)98×class="stub"2
97

=(97+1)×class="stub"2
97

=97×class="stub"2
97
+1×class="stub"2
97

=2+class="stub"2
97

=2class="stub"2
97


(6)21-class="stub"19
20
×21,
=(1-class="stub"19
20
)×21,
=class="stub"1
20
×21,
=class="stub"21
20

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