Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
66 + 20 = ______
65 + 10 = ______
72 − 10 = ______
49 − 10 = ______
89 − 10 = ______
47 + 10 = ______
32 − 10 = ______
12 + 20 = ______
8 × 10 = ______
42 + 20 = ______
93 − 10 = ______
78 − 10 = ______
81 + 20 = ______
28 + 20 = ______
75 − 10 = ______
4 × 10 = ______
87 + 10 = ______
62 + 10 = ______
76 − 10 = ______
18 + 20 = ______
