问题
解答题
解方程. x×(
2x-90%=6.3. |
答案
(1)x×(
+5 9
)=5 12
,7 20
x×
=35 36
,7 20
x×
÷35 36
=35 36
÷7 20
,35 36
x=
;9 25
(2)2x-90%=6.3,
2x-90%+90%=6.3+90%,
2x=7.2,
2x÷2=7.2÷2,
x=3.6.
解方程. x×(
2x-90%=6.3. |
(1)x×(
+5 9
)=5 12
,7 20
x×
=35 36
,7 20
x×
÷35 36
=35 36
÷7 20
,35 36
x=
;9 25
(2)2x-90%=6.3,
2x-90%+90%=6.3+90%,
2x=7.2,
2x÷2=7.2÷2,
x=3.6.
选一选,情景对话。 | |
2. What's your mother? ________________ 3. ________________ Yes, she is. 4. How many people in your family? ________________ 5. ________________ It's a photo of my family. |