3-40 Assessment

Practice estimating the sum.  Fill in the boxes.

37	Rounds to			17	Rounds to
+  22	Rounds to	+		+  42	Rounds to	+
56	Rounds to			28	Rounds to
+  22	Rounds to	+		+  51	Rounds to	+
81	Rounds to			68	Rounds to
+  11	Rounds to	+		+  19	Rounds to	+
23	Rounds to			38	Rounds to
+  39	Rounds to	+		+  51	Rounds to	+
27	Rounds to			38	Rounds to
+  57	Rounds to	+		+  14	Rounds to	+

Practice estimating the difference with two-digit and three-digit numbers.

68	Rounds to			53	Rounds to
-  31	Rounds to	-		-  27	Rounds to	-
479	Rounds to			342	Rounds to
-  169	Rounds to	-		-  199	Rounds to	-
82	Rounds to			48	Rounds to
-  33	Rounds to	-		-  17	Rounds to	-
274	Rounds to			669	Rounds to
-  113	Rounds to	-		-  321	Rounds to	-
27	Rounds to			93	Rounds to
-  13	Rounds to	-		-  38	Rounds to	-
527	Rounds to			817	Rounds to
-  210	Rounds to	-		-  199	Rounds to	-
39	Rounds to			73	Rounds to
-  27	Rounds to	-		-  19	Rounds to	-