1. (★☆☆☆☆)直接写出得数。
$32 + 5 = $
$32 + 50 = $
$24 + 5 = $
$24 + 50 = $
$32 + 5 = $
37
$51 + 4 = $55
$43 + 4 = $47
$32 + 50 = $
82
$51 + 40 = $91
$43 + 40 = $83
$24 + 5 = $
29
$33 + 6 = $39
$25 + 3 = $28
$24 + 50 = $
74
$33 + 60 = $93
$25 + 30 = $55
答案:
$32 + 5 = 37$;$51 + 4 = 55$;$43 + 4 = 47$;
$32 + 50 = 82$;$51 + 40 = 91$;$43 + 40 = 83$;
$24 + 5 = 29$;$33 + 6 = 39$;$25 + 3 = 28$;
$24 + 50 = 74$;$33 + 60 = 93$;$25 + 30 = 55$。
$32 + 50 = 82$;$51 + 40 = 91$;$43 + 40 = 83$;
$24 + 5 = 29$;$33 + 6 = 39$;$25 + 3 = 28$;
$24 + 50 = 74$;$33 + 60 = 93$;$25 + 30 = 55$。
2. (★☆☆☆☆)想一想,填一填。
(1)2个十和5个十合起来是(
(2)6个十和7个一合起来是(
(3)$65 + 4 = $(
(4)$43 - 7 = $(
(1)2个十和5个十合起来是(
7
)个十,是(70
)。(2)6个十和7个一合起来是(
67
),减5个一是(62
)。(3)$65 + 4 = $(
69
),想:先算(5
)加(4
),得(9
);再算(60
)加(9
),得(69
)。(4)$43 - 7 = $(
36
),想:先算(13
)减(7
),得(6
);再算(30
)加(6
),得(36
)。
答案:
(1)7;70
(2)67;62
(3)69;5;4;9;60;9;69
(4)36;13;7;6;30;6;36
(1)7;70
(2)67;62
(3)69;5;4;9;60;9;69
(4)36;13;7;6;30;6;36
3. (★★☆☆☆)在$◯$里填上“>”“<”或
=
>
<
<
答案:
$=$,$>$,$<$,$<$
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