3
3
3
3
3
3
3
-
3 +
3 ÷
3 = 13
÷
3 +
3 ÷
3 = 23
×
3 - (
3 +
3) = 3(
3 ×
3 +
3) ÷
3 = 43
-
3 ÷
3 +
3 = 53
+
3 +
3 -
3 = 63
+
3 +
3 ÷
3 = 73
×
3 -
3 ÷
3 = 8答案:解析:本题主要考查四则运算以及运算优先级。
$3 - 3 + 3 ÷ 3 = 1$;
$3 ÷ 3 + 3 ÷ 3 = 2$;
$3 × 3 - (3 + 3) = 3$;
$(3 × 3 + 3) ÷ 3 = 4$;
$3 - 3 ÷ 3 + 3 = 5$;
$3 + 3 + 3 - 3 = 6$;
$3 + 3 + 3 ÷ 3 = 7$;
$3 × 3 - 3 ÷ 3 = 8$。
答案:
$3 - 3 + 3 ÷ 3 = 1$;
$3 ÷ 3 + 3 ÷ 3 = 2$;
$3 × 3 - (3 + 3) = 3$;
$(3 × 3 + 3) ÷ 3 = 4$;
$3 - 3 ÷ 3 + 3 = 5$;
$3 + 3 + 3 - 3 = 6$;
$3 + 3 + 3 ÷ 3 = 7$;
$3 × 3 - 3 ÷ 3 = 8$。(部分答案不唯一)
$3 - 3 + 3 ÷ 3 = 1$;
$3 ÷ 3 + 3 ÷ 3 = 2$;
$3 × 3 - (3 + 3) = 3$;
$(3 × 3 + 3) ÷ 3 = 4$;
$3 - 3 ÷ 3 + 3 = 5$;
$3 + 3 + 3 - 3 = 6$;
$3 + 3 + 3 ÷ 3 = 7$;
$3 × 3 - 3 ÷ 3 = 8$。
答案:
$3 - 3 + 3 ÷ 3 = 1$;
$3 ÷ 3 + 3 ÷ 3 = 2$;
$3 × 3 - (3 + 3) = 3$;
$(3 × 3 + 3) ÷ 3 = 4$;
$3 - 3 ÷ 3 + 3 = 5$;
$3 + 3 + 3 - 3 = 6$;
$3 + 3 + 3 ÷ 3 = 7$;
$3 × 3 - 3 ÷ 3 = 8$。(部分答案不唯一)
6
6
6
6
6
6
(6 - 6)× 6 + 6÷ 6
= 16
(6 + 6)÷ 6 + 6 - 6
= 26
(6 + 6)÷ 6 + 6÷ 6
= 36
(6 + 6 + 6 + 6)÷ 6
= 46
6 - (6 + 6)÷ (6 + 6)
= 56
(6 - 6)× (6 + 6) + 6
= 6答案:[跟踪练习] 答案不唯一,如:$(6 - 6)× 6 + 6÷ 6 = 1$ $(6 + 6)÷ 6 + 6 - 6 = 2$ $(6 + 6)÷ 6 + 6÷ 6 = 3$ $(6 + 6 + 6 + 6)÷ 6 = 4$ $6 - (6 + 6)÷ (6 + 6) = 5$ $(6 - 6)× (6 + 6) + 6 = 6$