一、我会填。
1. 在横线上填上适当的数。
(1)$58 + 47 + 42 + 53 = (\_\_\_\_\_\_$
(2)$381 + 236 + 464 = 381 + (\_\_\_\_\_\_$
(3)$634 - 123 - 377 = 634 - (\_\_\_\_\_\_$
(4)$125×56 = 125×\_\_\_\_\_\_×\_\_\_\_\_\_$
(5)$235×14 + 235×86 = 235×(\_\_\_\_\_\_$
(6)$2100÷14 = 2100÷\_\_\_\_\_\_÷\_\_\_\_\_\_$
1. 在横线上填上适当的数。
(1)$58 + 47 + 42 + 53 = (\_\_\_\_\_\_$
58
$+$42
$\_\_\_\_\_\_) + (\_\_\_\_\_\_$47
$+$53
$\_\_\_\_\_\_)$(2)$381 + 236 + 464 = 381 + (\_\_\_\_\_\_$
236
$+$464
$\_\_\_\_\_\_)$(3)$634 - 123 - 377 = 634 - (\_\_\_\_\_\_$
123
$+$377
$\_\_\_\_\_\_)$(4)$125×56 = 125×\_\_\_\_\_\_×\_\_\_\_\_\_$
8
7
(5)$235×14 + 235×86 = 235×(\_\_\_\_\_\_$
14
$+$86
$\_\_\_\_\_\_)$(6)$2100÷14 = 2100÷\_\_\_\_\_\_÷\_\_\_\_\_\_$
7
2
答案
1. (1)58 42 47 53 (2)236 464
(3)123 377 (4)8 7 (5)14 86
(6)7 2
(3)123 377 (4)8 7 (5)14 86
(6)7 2
2. 根据运算律,在$◯$里填上运算符号,在横线上填上适当的数。
(1)$765 - 146 - 54 = 765 -$$(\_\_\_\_\_\_◯\_\_\_\_\_\_)$
(2)$12000÷125÷8 = 12000÷(\_\_\_\_\_\_◯\_\_\_\_\_\_)$
(3)$87×99 + 87 = 87×(\_\_\_\_\_\_◯\_\_\_\_\_\_)$
(4)$\_\_\_\_\_\_×(40$$+ 8) = 25×\_\_\_\_\_\_◯\_\_\_\_\_\_×8$
(5)$13×125×8 = 13◯(125×\_\_\_\_\_\_)$
(6)$365 - 199 = 365 - 200◯\_\_\_\_\_\_$
(1)$765 - 146 - 54 = 765 -$$(\_\_\_\_\_\_◯\_\_\_\_\_\_)$
(2)$12000÷125÷8 = 12000÷(\_\_\_\_\_\_◯\_\_\_\_\_\_)$
(3)$87×99 + 87 = 87×(\_\_\_\_\_\_◯\_\_\_\_\_\_)$
(4)$\_\_\_\_\_\_×(40$$+ 8) = 25×\_\_\_\_\_\_◯\_\_\_\_\_\_×8$
(5)$13×125×8 = 13◯(125×\_\_\_\_\_\_)$
(6)$365 - 199 = 365 - 200◯\_\_\_\_\_\_$
答案
2. (1)146 + 54 (2)125 × 8
(3)99 + 1 (4)25 40 + 25
(5)× 8 (6)+ 1
(3)99 + 1 (4)25 40 + 25
(5)× 8 (6)+ 1
3. 在$◯$里填上“$>$”“$<$”或“$=$”。
$168 - 48 - 52◯168 - (48 + 52)$ $97×8×50◯97×8 + 50$
$(25 + 126)×4◯25×4 + 126$ $360÷(6×12)◯360÷6×12$
$32×125◯125×4 + 125×8$
$168 - 48 - 52◯168 - (48 + 52)$ $97×8×50◯97×8 + 50$
$(25 + 126)×4◯25×4 + 126$ $360÷(6×12)◯360÷6×12$
$32×125◯125×4 + 125×8$
答案
3. = > > < >
4.
这堆原木一共有(
25
)根。答案
4. 25
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