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
21 − 10 = ______
47 − 10 = ______
44 + 20 = ______
84 − 10 = ______
75 + 10 = ______
47 + 20 = ______
55 − 10 = ______
58 + 20 = ______
13 + 10 = ______
6 × 10 = ______
3 × 10 = ______
22 + 10 = ______
9 × 10 = ______
76 + 20 = ______
38 + 10 = ______
8 × 10 = ______
87 − 10 = ______
98 − 10 = ______
70 + 20 = ______
81 + 20 = ______
