The student will be able to:
use concrete and pictorial models to determine the sum of a multiple of 10 and a one-digit number in problems up to 99;
: use objects and pictorial models to solve word problems involving joining, separating, and comparing sets within 20 and unknowns as any one of the terms in the problem such as 2 + 4 = [ ]; 3 + [ ] = 7; and 5 = [ ] - 3;
: compose 10 with two or more addends with and without concrete objects;
: apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10;
: explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences; and
MA.1.3.F: generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20.