三、连一连。
$2x + 15 = 35$
$8x ÷ 5 = 14.4$
$7x - 36 = 41$
$x = 9$
$x = 4$

$x = 3$
$x = 11$
$5x + 2.2 = 17.2$
$6x - 45 = 9$
$4x - 11.4 = 4.6$
$2x + 15 = 35$
$8x ÷ 5 = 14.4$
$7x - 36 = 41$
$x = 9$
$x = 4$
$x = 3$
$x = 11$
$5x + 2.2 = 17.2$
$6x - 45 = 9$
$4x - 11.4 = 4.6$
答案
1.张华有42张卡片,正好比笑笑卡片的4倍少6张,笑笑有多少张卡片?
答案
1. 解:设笑笑有x张卡片。
4x - 6 = 42
x = 12
4x - 6 = 42
x = 12
2. 地球绕太阳一周要用 365 天,比水星绕太阳一周所用时间的 4 倍多 13 天,水星绕太阳一周要用多少天?
答案
2. 解:设水星绕太阳一周要用x天。
4x + 13 = 365
x = 88
4x + 13 = 365
x = 88
算一算
$9.1 + 2.9 =$
$0.77 - 0.67 =$
$9.03 + 0.07 =$
$27.38 + 4.83 =$
$6.75 + 2.83 =$
$3.64 - 2.58 =$
$17.6 - 7.6 =$
$17.6 - 1.76 =$
$1.9 - 0.5 =$
$7.8 + 2.2 =$
$9.1 + 2.9 =$
$0.77 - 0.67 =$
$9.03 + 0.07 =$
$27.38 + 4.83 =$
$6.75 + 2.83 =$
$3.64 - 2.58 =$
$17.6 - 7.6 =$
$17.6 - 1.76 =$
$1.9 - 0.5 =$
$7.8 + 2.2 =$
答案
9.1 + 2.9 = 12
0.77 - 0.67 = 0.1
9.03 + 0.07 = 9.1
27.38 + 4.83 = 32.21
6.75 + 2.83 = 9.58
3.64 - 2.58 = 1.06
17.6 - 7.6 = 10
17.6 - 1.76 = 15.84
1.9 - 0.5 = 1.4
7.8 + 2.2 = 10
0.77 - 0.67 = 0.1
9.03 + 0.07 = 9.1
27.38 + 4.83 = 32.21
6.75 + 2.83 = 9.58
3.64 - 2.58 = 1.06
17.6 - 7.6 = 10
17.6 - 1.76 = 15.84
1.9 - 0.5 = 1.4
7.8 + 2.2 = 10
登录